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All Patents in class 474/43
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	1,434,992	Nov. 07, 1922	H.C. Clay	Speed Varying Transmission
	2,032,015	Feb. 25, 1936	D.H. Heynau	Friction gear transmission
	3,150,527	Sep. 29, 1964	G.L. Trandel	Variable speed device and adjusting means therefor

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